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The Runner 4 is a bone conduction headset that sends sound through your cheekbones and leaves your ear canals open, so you hear traffic, coworkers and announcements while you listen. Bluetooth 5.4 and IPX8 water resistance are its headline specs: it is built for sweat, rain and even swimming, which is more than most open-ear rivals offer. Sound is thinner than in-ear headphones, with light bass and some vibration at high volume, so it suits runners, cyclists and swimmers more than commuters chasing deep sound. Owners of earlier Runner models report the same fit and awareness benefits, with the usual bone-conduction trade-offs on bass and leakage.
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Lowest price we've seen: $79.99 on Nov 9 at Newegg. Tracked across 1 store since Nov 9.
Feedback on the Runner line is generally positive on fit, durability and situational awareness, with recurring complaints about bass and vibration. Swimmers and runners rate the water resistance highly; listeners wanting full sound find it lacking.